Abstract: A betatron is provided, particularly for an x-ray inspection station, and includes a rotationally symmetrical inner yoke that is composed of two spaced-apart pieces, an outer yoke which connects the two pieces of the inner yoke, at least one main field coil, and at least one toroidal betatron tube located between the pieces of the inner yoke. At least part of the inner yoke and/or the outer yoke can be made of a composite powder.

Abstract: A spunbond fleece is made by passing cellulosic filaments from a spinneret in a travel direction through a cooling chamber having upstream and downstream compartments spaced apart in the travel direction. In each of the compartments a respective stream of cooling air is directed against the filaments. The cooling air of each stream has parameters of temperature, humidity, and flow rate. At least one of the parameters of one of the streams is varied such that it is different from corresponding parameter of the other stream.

Abstract: An apparatus for making a spunbond web has a deposition surface, a spinneret above the surface for producing filaments that move downward along a path toward the surface, and a cooling chamber below the spinneret. Cool process air is supplied to the chamber to cool the filaments as they pass downward through the chamber. A laterally closed stretching unit downstream of the cooling chamber has laterally closed side walls that have portions that diverges downward. A connecting region between the stretching unit and the cooling chamber substantially excludes access of air from outside to the filaments as they pass from the cooling chamber to the stretching unit so that the filaments drop from the stretching unit onto the deposition surface.

Abstract: A web or fleece of synthetic resin strand collected on a sieve belt is discharged from the sieve belt into further processing equipment over a rerouting roller at the discharge end of the sieve belt. The rerouting roller is perforated and air or another fluid medium is passed through the belt at the rerouting roller to reduce adhesion forces between the belt and the web and lift the web from the belt without damage to the belt.

Abstract: A nozzle for producing filaments or fibers of thermoplastic synthetic resin has at the nozzle end one or more bores, preferably opening at a flat surface and receiving respective inserts or shaped bodies which are formfitting in the bores and have along their peripheries respective nozzle channels opening at orifices through which the synthetic resin is discharged. Air streams may be directed at the strand at an acute angle when fibers are to be produced.

Abstract: Device for producing filaments from thermoplastic synthetic, with a meltblown die head, which as a guiding core with at least one row of orifices for the discharge of molten synthetic, one or more feed devices for primary blown air on both sides of the synthetic guiding core with which the filaments in the region of the apertures of the orifices can be subjected to primary blown air on both sides, and at least one feed device for secondary blown air with which the filaments can be subjected to secondary blown air sideways beneath the meltblown die head.

Abstract: An apparatus for producing a melt blown web in which the collecting screen upon which the filaments are deposited passes over a plurality of suction regions or areas which have respective suction blowers and controls for the suction force and air throughput.

Abstract: Device for the continuous production of a nonwoven web from filaments made from a thermoplastic synthetic, with a spinning nozzle, a cooling chamber, a stretching unit and a depositing device for depositing the filaments to the nonwoven web. Two or more different polymer fusions can be fed to the spinning nozzle, and a device for merging the different polymer fusions is provided such that bi-component filaments and multi-component filaments can exit from the spinning nozzle openings of the spinning nozzle. The cooling chamber is divided into at least two cooling chamber sections in which the bi-component filaments and multi-component filaments can be respectively acted upon by process air with different convective heat conduction means.

Abstract: An apparatus for producing spun-bond webs has, beneath the receiving belt, a suction unit having at least two suction zones including a primary suction zone and at least one other suction zone, the primary suction zone receiving most of the filaments from an aerodynamic stretching unit below a spinneret. The suction speeds in the two zones can be adjusted independently of one another. Preferably three such zones are provided in succession in the direction of displacement of the perforated belt.

Abstract: A spun-bond web-making apparatus has the cooling passage below the spinneret provided with a plurality of air chamber sections which are supplied with air at different temperatures, the cooling passage being connected to the drawing unit for aerodynamic stretching of the filaments without a gap through which external air can be supplied.

Abstract: In the production of a spunbond web by aerodynamically stretching thermoplastic filaments from a spinneret, the stretching nozzle is formed by two nozzle-forming units each of which has a temperature control device, especially a heater, to minimize deformation at the stretching nozzle defining wall. The result is a reduction in the tolerance of the basis weight of the spunbond web.

Abstract: A nozzle for producing filaments or fibers of thermoplastic synthetic resin has at the nozzle end one or more bores, preferably opening at a flat surface and receiving respective inserts or shaped bodies which are formfitting in the bores and have along their peripheries respective nozzle channels opening at orifices through which the synthetic resin is discharged. Air streams may be directed at the strand at an acute angle when fibers are to be produced.

Abstract: A web or fleece of synthetic resin strand collected on a sieve belt is discharged from the sieve belt into further processing equipment over a rerouting roller at the discharge end of the sieve belt. The rerouting roller is perforated and air or another fluid medium is passed through the belt at the rerouting roller to reduce adhesion forces between the belt and the web and lift the web from the belt without damage to the belt.

Abstract: An apparatus for producing a melt blown web in which the collecting screen upon which the filaments are deposited passes over a plurality of suction regions or areas which have respective suction blowers and controls for the suction force and air throughput.

Abstract: A spun-bond web-making apparatus has the cooling passage below the spinneret provided with a plurality of air chamber sections which are supplied with air at different temperatures, the cooling passage being connected to the drawing unit for aerodynamic stretching of the filaments without a gap through which external air can be supplied.

Abstract: An apparatus for producing spun-bond webs has, beneath the receiving belt, a suction unit having at least two suction zones including a primary suction zone and at least one other suction zone, the primary suction zone receiving most of the filaments from an aerodynamic stretching unit below a spinneret. The suction speeds in the two zones can be adjusted independently of one another. Preferably three such zones are provided in succession in the direction of displacement of the perforated belt.

Abstract: In the production of a spunbond web by aerodynamically stretching thermoplastic filaments from a spinneret, the stretching nozzle is formed by two nozzle-forming units each of which has a temperature control device, especially a heater, to minimize deformation at the stretching nozzle defining wall. The result is a reduction in the tolerance of the basis weight of the spunbond web.

Abstract: The detector materials (8, 9) of a low energy detector (5) and a high energy detector (6) are coordinated with one another to permit better separation of lower and higher energy fractions of polychromatic X-ray (X′) radiation, and consequently, create a better determination of a material of an object through which the X-rays are passed. Thus, a negligible persistence in comparison with the integration time between two detector readings is achieved.

Abstract: An X-ray generating system includes a first high-voltage source generating a first high voltage; a second high=voltage source generating a second high voltage different from the first high voltage; and an X-ray generator. The X-ray generator includes a first assembly having a first cathode and a first anode for emitting a first X-ray beam from a first focal point on the first anode upon application of the first high voltage to the first assembly. The X-ray generator further includes a second assembly having a second cathode and a second anode for emitting a second X-ray beam from a second focal point on the second anode upon application of the second high voltage to the second assembly. The two X-ray beams exit the X-ray generator parallel to one another.

Abstract: A monitoring installation for containers and trucks is provided making detection of large items, particularly trucks, at minimal expense possible. An X-ray monitoring installation having low X-ray energy, permits detection of stolen passenger cars, is arranged on a monitoring path.